Portable machine tool



Sept. 12, 1933. o. E. GUIBERT ET AL PORTABLE MACHINE TOOL Filed April 29, 1930 5 Sheets-Sheet l ms \\\\\\\\m N elm R.

INVENTORS Sept. 12, 1933. o. E. GUIBERT ET AL PORTABLE MACH INE TOOL Filed April 29, 1930 3 Sheets-Sheet Patented Sept. 12, 1933 Oscar E. Guibert,

Grafton, and Samuel R.

Bachtel, Pittsburgh, Pa., assignors to Guibert Steel Company, Pittsburgh, Pa., a corporation of Pennsylvania.

Application April 29, 1930.. Serial No. 448,218

16 Claims.

Our invention relates to motor driven rotary machines adaptedgto drive drills, countersinks, reamers, grinders, polishers, and the like.

Some of the objects of this invention are to provide for such a machine a plurality of rollers arranged end to end and forming a substantially continuous rolling support; to provide for the machine a preferably adjustable support in front of the rollingsupport and at the rearof the. rotary tool; to provide a number of weights which by their number and. arrangement balance the machine asnearly as may be desired and prevent the machine from being lifted on the rotary tool as a pivot when the tool is forced longitudinally to its work; to provide a system of levers for causing the tools to be driven longitudinally during their rotation; to provide novel means for accurately predetermining the longitudinal travel of the rotary tool and for locking the. tool against the longitudinal travel. when thelever system is to be used as a rigid means for moving the machine; to provide a novel means for connecting the rotary tool to the said system of levers; to provide a novel means for causing the rotary tool to have no rotary movementin its immediate rotary driver and for causing. the driver to have rotary motion without longitudinal travel; to provide means whereby the feed of liquid cutting compound to the tool may be controlled at ,a distance from the tool; and iprovide for a rotary tool driven at a predeterminedspeed a secondary tool such as a grinding or polishing wheel driven at a more rapid speed. Other objects appear hereinafter.

Referring to the accompanying drawings, Fig.

1 is a side elevation of the preferred form of our.

invention, a portion being broken away andone of the weight holders being omitted; Fig; 2, a side elevation of the rigid frame which is supported by means hereinafter described and supports the motor and the drilling tool and various other elements; Fig. 3, a topplan view of our machine; Fig. 4, a rear elevation of the same; Fig. 5, a view in vertical section of the rotary tool holder with the partssuppo'rting and rotating the same. parts being broken away; Fig. 6, an elevation of the leg herein described together with an attachment shown in connection with a cross sectionof an I-beam; Fig. 'I, a view of the lower part of the said leg with a different form of attachment; and Fig. 8, a detail showing the cutting compcund valve together with adjacent elements.

The machine frame shown inside elevation in Figs. 1 and 2 and in plan in Fig; 3 comprises severa1 metalshapes and bars secured together by any selected means such as welding to form a forward portion of less vertical depth than the rear portion. The bottom of the upper portion of the frame has at each side thereof a pendent ear or lug 1 having an open slot 2 at its lower end to receive the tubular axle 3 which-is secured to the ears by nuts 4. The axle has thereon between the cars a number of rollers 5 freely rotatable thereon, the rollers being arranged end to end and forming substantially a continuous rolling support for the frame. A supplemental axle 6 may, if desired, be supported in the axle 3, the ends of the supplemental axle projecting laterally beyond the ears 1 and provided with supplemental rollers '7 arranged to form with the rollers 5 a substantially continuous rolling support for the frame. The rollers 7 may be held on the axle 6 by any desired means, as by cotter pins.

Theforward part of the frame which extends to a less depth at its underside than the rear portion of the frame is provided with, the gear case .8 containing the intermeshing gears 9 and 10, the

latter being keyed to the motor shaft 11 driven by the motor 12 in the rear portion of the frame. The hub of the gear 9 is mounted on the vertical sleeve 13 having its ends .mounted in antifriction bearings 14 at the upper and lower portions of the gear casing. The hub 15 of the gear 9 and the sleeve 13 are connected together'by the key 16'. Slidable longitudinally in the sleevel3 is'the tool holder or spindle 17 having from end to end the longitudinal groove 18, into which the key 16 projects and serves as a spline to cause the tool holder to rotate, while allowing it to reciprocate.

The "lower end of the'tool holder 1'7 is provided 'With'a socket 20 shown in dotted lines to contain a rotary tool such as the drill 21 2.000111? ,panying Fig. 1.

The tool holder 1'] is provided above the frame withfsuitable means for regulating the longitudinal movements thereof. For this purpose we provide on the tool support the sleeve 22 having part, of its terminal portions externally threaded, and'parts tapered outwardly, and provided with longitudinal slots 23. The sleeve carries the spline 19 which extends into the groove 13. This sleeve carries around its central portion-the two races 24 for the antifriction rollers 25.,The outer faces of the rollers are provided'with the races 26 which aresurrounded by the collar 27. The upper and lower ends of the collar 27pandthe upper and lower ends of the races 26 are closed by the rings 28. There are two nuts 29 which .work on the said threadedouter surfaces 31 is a cross-shaped member having the two side arms 32 and the two threaded arms 33 and 34. The arms 32 are provided with'rollers 35 which travel backwards and forwards between the plate 32' on the said end of the machine frame and the two metal strips .36 whose ends are secured to the blocks 37 through which the arms 33 and 34 project, these blocks being secured to the plate 32'. are respectively provided with the nuts 38 and 39 which are adapted to be screwed up against the outer faces of the blocks 37. The outer ends of the arms 32' are pivoted to the ends of the levers 40, the rear ends of the levers 40'being pivotally connected to the trunnions 41 at the opposite sides of the collar 27. The links 42 have their rear ends pivotally connected on the pins 43 carried by the cars 44 on the top of the machine frame. The forward ends of the links 42 are pivotally connected to the levers 40 by means of the pivot bar 45 which extends not only through the levers 40 and the links 42, but also through the side members 46 of the vertical swinging member 47. The members 46 are connected together 'by the top member 48 which is provided with the handle 49. The pivot rod 45 is held in place by nuts59 bearing against the outer faces of the links 42; The distance between the centers of the pins 43 and the pivot bar 45 is equal to the distance between the pivot bar 45 and the centers of the trunnions 41. The centers of the trunnions 41 and the pins 43 lie in a vertical plane which includes the longitudinal center of the tool holder 17.

51 is a forwardly projecting handle or lever having its lateral members 52 pivotally connected to the machine frame by the pivot bolts 53. The forward end of the handle 51 has the handle member 54 which an attendant may grasp in order to move the machine or control the longitudinal positions of the tool holder 17. The side members 52 of the handle 51 carry the cross bar 55 which fits in any one of. the notches 56 in the forward edges of the side members 46 of the swinging member 47. Springs 57 tend to hold the notches in operative connection with the cross bar 55 when the handle 49 is operated to move the swinging member 47 so as to releas the notches from the cross bar.

.58 is a receptacle to contain a liquid-cutting compound which may be delivered to the tool 21 through the pipe 59 provided with the valve 60 operated by the lever 61. This lever is operated by the wire or cord 62 attached to the hand lever 63 on the handle 51. The lever 61 is moved forwardly by the lever 63 to open the valve 61, the valve being returned by the spring 64.

65 is an electric controller box provided with the controller handle 66, the electric cable 67 leading from the controller box 65 to the motor 12. The electric power cable 68 may be wound around the container 58 when the machine is not in use or is being moved.

vertical side members 70 and the. bottom con.-

The arms 33 and 34 necting member 71. The side members are provided with longitudinal vertical slots 72 guided on the bolts 73 carried by the machine frame. The members 70 may be secured in any selected vertical position by tightening the nuts 74 on the bolts 73. By placing the leg back of the tool the operator who is at the outer end of the handle 51 can at all times see how the tool 'is operating and he has a clear view of the center marks and the point of the tool so that he can readily enter the point of the tool into the center marks. The positioning of the tool in front of the leg enables a hole to be drilled close to the end of a plate or other structure. In case the leg were in front of the tool the machine could not be supported by the leg if the tool is to operate close to the end of a plate or the like or close to an obstruction such as the flange of an I-beam. The relative positions of the tool and the leg as shown permit the replacement of the tool Without interference with the leg. The leg is made adjustable vertically to permit the tool 21 or its equivalent to work at right angles to the surface being Worked upon.

The member 71 would be located at such a height member 71 rests upon the said edges, thus bringing the bottom of the rollers and member 71 to the same elevation. In case the leg 69 is not long enough a supplemental leg may be removably attached to the'member 71 as shown in Fig. 6. plemental leg whose bottom member 76 is of less length than the bottom member 71 so that the supplemental member may reach down into narrower places into which the member 71 could not enter. This is shown in Fig. 6. more, the supplemental leg would allow the tool 21 to be swung closer to the flanges of the I-beam 77 so that holes could be drilled much closer to. the said flanges than by use of the leg 69 without the supplemental leg 75.

In Fig. 7 the bottom member 71 of the leg 69 is provided with a supplemental leg '78 which is much longer than the bottom member 71. This construction would be useful where a longer support is needed as with channels or I-beams with .2

very great distances between the flanges.

The sides of the rear portion of the frame are provided with horizontal tubes 79 into which the side members 79 of the weight support 80 telescope. The members 79' have the upstanding pins 81 upon which a variable number of weights 82 may be strung, these weights having notches 83 placed to facilitate the handling thereof. Uponthe top of the weights is placed a tool box 84 having lateral projections 85 telescoped over machine frame, each box having hooks 88 which engage over the bars 89 carried by the machine frame. These boxes contain metal weights 90 provided with handles 91.. These boxes may be moved along the bars 89 to adjust the weights In this figure 75 designates a sup- Furtherj, 1]

Also the number and size of with respect to the axle or the rollers 5. These "side weights are not primarily for balancing the motor and theother parts of the machine, but are for providing variable weights whereby suf-. fi'cient pressure may be applied vertically down upon the tool. The weights 82 serve to balance the load and at the same time help to prevent any up-lift of the load occasioned by the operator when he presses down upon the handle member 54. If more weight were added back of the axle it would tend to overturn the machine backwards. We haveplaced additional weights onthe frame and balance the same'as nearly as prac ticable or as desired, which prevents any tend ency of their overbalancing the machine and at the same time they add more weight to resist the up-lifting effect just described.

In case 'it is necessary to remove or insert a tool in the bottom ofthespindle 17 them'achine is tilted backwardly as shown in dotted lines in Fig. 1. The center of gravity of the machine is so adjusted that when it is tilted as just described the machine will automatically remain in the tilted position.

In case it is desired to place a polishing or grinding wheel in place of the tool 21 we move the leg 69' to its full upper position as shown in Fig. 1 and remove therefrom a supplementalleg, if any. We also provide a supplemental leg 92 shown in dotted lines 01f Fig. 1, this leg being placed far enough behind the spindle 17 to accommodate the polishing or grinding or other tool.

We prefer to attach to the motor shaft 11 at the rear of the motor the grinding wheel 93, the wheel being operatively connected'to the shaft through a clutch 94. This grinding wheel may be used at'the same time that the tool 21 is in operation. It is preferred that the tool 93 r tate at a higher speed than the tool 21. Therefore it is better to attach the tool 93' to the motor shaft than to the spindle 17. Of course, it may be carried by the spindle 17 with good results.

By providing a plurality of rolling supports 5 with or without'the rolling supports 7 the machinecan be supported in proper working positions, no matter whether it is to travel on'the nar-,

row edge of a channel bar or an I-beam 96, as shown in Fig. 1, or on the wide-apart flanges 9'7 of an I-beam 98, as shown in Fig. 4, or on any equivalent surface. There is no tendency-of one rolling support dropping to a different level than that occupied by another rolling SuDpOrt.

The machine can be operated or moved easily by one operator and the weight on the axle 3 may be arranged to provide a maximum resistance to the uplift of the machine while the drill is operated without tilting or upsetting. It can be operated on the flanges or the webs of structural material and drill holes close to the ends thereof andit can drill 'webs close to the flanges.

The'rollers being loose on their axles permit the machine-to turn aroundatany angle as if it were on a fixed pivot without the necessity of rollers sliding upontheir supports.

With the parts as in full lines. in Fig. 1, the spindle 17 isat the top of its upper stroke. The motor being set in operation causes the tool 21 to rotate rapidly. The operator presses down on the handle member 54. This presses the swinging m'emben? downwardly, the latter pulling down the pivot bar 45 to which are connectedthe flexible joints of toggles, each comprising the link 42 and the right hand half of a lever 40. 'As the toggles straighten out the pivot bar goes down, the rollers move to the right so as to cause the levers 40. to move the spindle downward 1y without anylateral pressure thereon, this being necessitated by the levers 40 being twice the length of the links 42 which are pivoted to the centers of the levers 40 and by the location of the longitudinal center of .the spindle and the centers of the trunnions 41 and of the pivots 43 in the same vertical plane and by the rollers 35 having travel at rightangles to the axial center of the spindle.

The nuts 39 are set to cause thetool'to be lifted the desired distance above the material to be worked upon and tobei lowered so as to drill or countersink a hole the desired depth.

' 'We claim:--- 7 1; For a portable machine for drilling, reaming, andthe like, a frame, a rolling support therefor, a' reciprocable and rotatable toolholder on the frame and in front of the rolling support, the toolholder being adaptedto carry at one end a tool; a second support for the frame in front of the rolling support and at the rear of the tool holder, and a manually actuated means in front of the toolholder for reciprocating the toolholder, whereby the operator of said means has unobstructed view of a tool in the toolholder and whereby when the leg rests on the work to be drilled and the tool is to drill a holeclose to a flange or other obstruction on the said work, theimachine maybe swung laterally to drill the said hole without the obstruction of the leg by engagement with the flange or said other obstruction.

2. For a portable machine for drilling, reaming, andthe like, a frame, a rollingsupport therefor, a reciprocable and rotatable toolholder on theframe, the toolholder being adapted to carry at one end a' tool, a second comparatively narrow support for the frame in front of the rolling support and at the rear of the toolholder, and a manuallylactuated means in front of the toolholder for moving the toolholder, the second support being so positioned that the tool in the toolholder may be swung by the said manually actuated means against an obstruction in front of the toolor on either side of it without the said second support striking the obstruction and that the tool in the toolholder may be moved by the manually actuated means to or beyond the end or edge of the object uponwhich thesecond support rests.

. '3.'For a portable machine for drilling,- reaming, and the like, a frame, a rolling support therea for,- a reciprocable and rotatable tool holder on the frame, the toolholder being adapted to carry at one end a tool, a second support for the'frame in front of the rolling support and at the rear of the toolholder, and manually actuated means in front of the toolholder for moving the latter, whereby the operator of said means has unobstructed view of a tool in the toolholder, the second support having widely-spaced upstanding side members carried by the frame, and a comparatively long foot'member lying transversely of the machineand connected to the lower ends of the side members whereby the second support may lie upon a plurality of surfaces spaced transversely of the frame'and permit the tool to be swung laterally and positioned to drill holes close 'to the. said surfaces orat a level below the said surfaces. Y

4. For a portable machine for drilling, reaming; and the like, a frame, a rolling support therefor, a reciprocable and rotatable toolholder on.

the-frame, the toolholder being adapted to carry r, the

at one end a tool, a second support for the frame in front of the rolling support and at the rear of the toolholder, and manually actuated means in front of the toolholder for moving it, whereby the operator of said means has unobstructed view of a tool in the toolholder, the second support adjustably carried by the frame and comprising a pendent leg together with a supplemental leg extending below the pendent leg and adapted to be removably attached thereto, the lower end of the supplemental leg having a less extent transverse of the machine from what the lower end of the first leg has in a corresponding direction, to permit the operation of the tool within narrower quarters than permissible with the pendent leg alone. 7 v

5. For a portable machine for drilling, reaming, and the like, aframe, a rolling support therefor, a reciprocable and rotatable toolholder on the frame, the toolholder being adapted to carry at one end a tool, a second support for the frame in front of the rolling support and at the rear of the toolholder, and manually actuated means in front of the toolholder for moving it, whereby v the operator of said means has unobstructed view of a tool in the toolholder, the second support adjustably carried by the frame and comprising a pendent leg together with a removable supplemental leg extending below the pendent leg, the lower end of the supplemental leg having a greater extent transverse of the machine from what the lower end of the first leg has in a corresponding direction, to permit the second support to span wider spaces than could the pendent leg alone andto permit the tool to be swung transversely ofthe machine over a greater number of transversely-spaced objects than possible with the pendent leg alone withoutmoving the rolling support transversely. e

6. For a portable machine for drilling, reaming, and the like, a frame, a reciprocable and rotatable tool carried thereby, an axle for supporting the frame, a rolling support on the axle, secondary removable axle havingitsends projecting beyond the ends of the first axle, and rolling supports on the said projecting ends of the, secondary axles, the rolling supports being substantially continuous between the end rollers on the secondary axle. v

7. Fer a portable machine for drilling, reaming, and the like, a frame, a rotary tool carried thereby, a tubular axle for supporting theframe, a rolling support on the axle, a secondary removable axle lying in the tubular axle and having its ends projecting beyond the ends of the tubular axle, and rolling supports on the said projecting ends of the secondary axle, the rolling supports being arranged end to end and forming substantially a continuous rolling support.

8. In a machine for drilling, reaming, and the like, an axle, a frame supported thereon, a rotatable reciprocable tool on theframe, a handle, pivotal supports therefor, to the frame an operative connection between the handle and the tool for reciprocating the tool, and'a releasable locking connection between the handle and the frame and between the tool and the handle whereby the handle may be swung on its pivotal supports to reciprocate the tool without moving the frame when the locking connection is made inoperative and whereby the frame maybe tilted on the axle without reciprocating the tool when looking connection is, made operative. 9. in a portable machine for drilling, reaming,

and the like, an axle, a horizontal carriage there on, a rotatable spindle mounted on the carriage and movable transversely thereof, a motor rigid with the carriage and operatively connected to the spindle to rotate the same, a handle pivotally connected to the carriage and movable transversely thereof, means connecting the handle to the spindle for reciprocating the latter, and means for rigidly connecting the handle to the carriage for tilting the carriage on the axle, whereby the spindle may be reciprocated without tilting the carriage and the carriage may be tilted without reciprocating the spindle.

10. For a portable machine for drilling, reaming, and the like, a frame, a rotary vertical tool carried thereby, plurality of rollers to support the frame, the rollers being arranged end to end to form a substantially continuous rolling support substantially the width of the frame, whereby the machine may be easily swung laterally and whereby it may travel and rest upon and drill between upwardly-extending portions of work spaced apart at any distance within the combined length of the rollers, and whereby it may ride upon and drill a piece of work whose width has any value less than the combined length of the rollers; p

11. For a portable machine for drilling, reaming, and the like, a frame, a rolling support therefor, a motor on the frame, a rotary tool driven by the motor and carried by the frame in front of the rolling support, a handle having its rear end pivoted to the frame and extending in front of the tool, means connecting the handle and the tool for applying feeding pressure to the tool, and weights carried by the frame and arranged at opposite sides of the support and adjustable backwardly or forwardly to supply resistance tending to prevent the tilting of the frame on the tool when feeding pressure is applied by the handle and presenting substantially no resistance against the tilting of the frame on its rolling support.

12. For a portable machine for drilling, reaming, and the like, a frame, a rolling support therefor, a reciprocable and rotatable toolholder on the frame, the toolholder being adapted to carry at one end a tool, a second support for the frame in front of the rolling support and at the rear of the toolholder, and manually actuated means in front of the toolholder for moving it, whereby the operator of said means has unobstructed view of a tool in the toolholder, the second support adjustably carried by the frame and comprising a pendent leg, its foot having a comparatively small length transversely of the machine, whereby the tool may drill close to flanges or other obstructions.

13. For a portable machine for drilling, reaming, and the like, a frame, a rolling support therefor, a supporting leg for the frame carried by the latter in front of the rolling support, a vertical, rotary and reciprocatorytool stem in front of the leg, a handle pivoted to the frame and extending in front of the tool stem, a lever extending forwardly of the tool stem and conmeeting the tool stem and theframe, and a link connecting the handle between its pivotal supin front of the tool stem, a swivel on the tool stem permitting the stem to rotate therein and reciprocate therewith, a lever having one end pivoted to the swivel, means to guide the other end of the lever, a pendent link pivoted to the lever and the handle, whereby the lever may reciprocate the tool stem, and means preventing the pivotal operation of the lever and making the lever rigid with the frame.

15. For a portable machine for drilling, reaming, and the like, a frame, a rolling support therefor, a supporting leg carried by the frame in front of the rolling support, a vertical, rotary and reciprocatory tool stem in front of the leg, a handle pivoted to theframe and extending in front of the tool stem, a swivel on the tool stem permitting the stem to rotate therein and reciprocate therewith, a lever having one end pivoted to the swivel, means to guide the other end of the lever, a pendent link pivoted to the lever and the handle, and a load on the frame arranged as to value and position to prevent the lifting of the leg above the base on which it rests as the handle feeds the tool stem to its Work, the load being so distributed at opposite sides of the rolling support that it offers little or no resistance to the rotation of the frame on the rolling support and presents no force tending to turn the frame backwardly on its rolling support.

16. For a portable machine for drilling, reaming, and the like, a frame, a rolling support therefor, a supporting leg for the frame carried by the latter in front of the rolling support, a vertical, rotary and reciprocatory tool stem in front of the leg, a handle pivoted to the frame and extending in front of the tool stem, a lever extending forwardly of the tool stem and connecting the tool stem and the frame, a pendent link connecting the handle between its pivotal support and its operating end to an intermediate portion of the lever, and a link connected to the frame below the connection of the lever to the tool stem and also to the intermediate portion of the lever, the distance between the said pivotal connection and the connection of the lever and the link with the tool stem and fram respectively being equal.

OSCAR E. GUIBERT. SAMUEL R. BACHTEL. 

